Improvement in door-springs



JHN J. COWELL,

Door-Spring. I N0.127,311 .Paientedmayzanam UllvITEny tSTATES PATENTOEEIcE.

WHITE, 0E SAME PLACE.

` IMPROVEMENT INDOOR-SPRINGS.

Specication forming part of Letters Patent No. 127,311, dated May 28,1872 antedated May 11, 1872.

To all whom it may concern:

Be it known that I, JOHN J. GowELL, of Newark, in the county of Essexand in the State of New Jersey, have invented certainl new and usefulImprovements in Door- Spring; and do hereby declare that the followingis a full, clear, and exact description thereof, reference being had tothe accompanying drawing and to the letters of reference marked thereonmaking a part of this specification- The nature of my inventionconsists, irst, in the construction of the arm and spindle, which isinserted in and operates the spring; second, in the construction of thecouplings for adjusting the door-spring to any door; and third, in thecombination of the bracket, spring, arm, and spindle, couplings, andattachingplate, all constructed and arranged as will be hereinafter'morefully set forth.

In order to'enable others skilled in the art to which my inventionappertains to make and use the same, I will now proceed to describe itsconstruction and operation, referring to the annexed drawing, in which-Figure 1 is a perspective view of my doorspring applied to the casingside, and Figs. 2 and 3 are detached views of the same.

A represents the bed or casting, provided at its upper and lower endswith an outwardprojecting ear, B. The bed or casting A is also providedwith a vertical slot, a, forming a double groove, into which the springO hooks from either side, either right or left. This spring is madeofbrass, coiled, as shown, and provided at both ends with hooks 5 orrather the ends are bent to form hooks, as shown in Fig. 3. D representsan arm, having a spindle, b, at one end extending at right angles fromthe arm, said spindle being provided with four projections, in which thespring is hooked, the spindle passing through the ears B B and thecenter of the spring, so that the hook, on its inner end, can catch oneither of the four projections. On the'other end of the arm D is a pin,d, which is inserted in a hole or slot in the coupling E, said couplingbeing provided with a series of holes for the insertion of a hook, e,upon the outer end of another coupling-rod, Gr. The other end of thislatter coupling Gr is provided with a slot to catch on a pin, i,extending downward from a casting, H. The slots in the couplings E and Gare key-hole shaped, so as to be securely fastened to the headed pins dand i. The bracket A is placed, for casing-side application, on the toprail of the door, as close to the hinge end as will allow the arm D toswing around when the door is at right angles with the frame, lettingthe top 4of the bracket come even with the top of the door. Screw theattachment H fast to the head-casing,`with pin t' downward, two inchesfurther from the hinge-edge than the spindle of the arnu D 5 attachcouplings E and G and take up just enough to keep the latter fromstriking the shoulder of the arm D when the door is closed. .When thedoor opens the arm D swings over the top of the door. For jambsideapplication the bracket A is placed on the rail of the door as close tothe head-jamb as will admit the free. passage of the arm D under thejamb when the door opens or closes, and as far from thehin ge edge aswill allow the end of the arm D to project beyond the edge of the doorone-half inch. Attach the coupling E to itas the door stands open, andmake the attachment H fast to the side of the jamb, with the pin upward,and as far from the door as the couplings E and G will allow, and letthe door swing open.

In all cases it will be found more convenient to remove the spring whileapplying the castings; but care should be taken not to injure the springby unwinding it. To tighten the spring, lift out the arm D and turn thespindle back one square in the socket of the spring.

The couplings E and G can be lengthened or shortened at will. To changefrom right to left, lift out the spring and turn it end for end. Thisspring may also be applied to gates.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

l. The arm D, provided with spindle b, hav

ing four projections, substantially as shown and described, and forthepurposes herein set forth.

2. The couplings E and Gr, constructed as shown and described, with hooke and slots and holes, substantially as Vand for the purposes herein setforth. A v

3. The combination, with the bracket A B, of the hooked spring C, angedspindle b, arm D, adjustable and detachable couplings E and Gr, and theattaching-plate H i, al1 constructed` March, 1871.

JOHN J. COWELL.

Witnesses:

DANIEL LAUCK, OTTO H. LAUCK.

